Revert of Overlays: Remove special casing of primary overlay plane

cc/output/direct_renderer.cc

Index: cc/output/direct_renderer.cc
diff --git a/cc/output/direct_renderer.cc b/cc/output/direct_renderer.cc
index f98151833e040baeeb7b81076c53d949d0307a2c..58facc4f12111f65d061d0ae4a22f2234d5865a8 100644
--- a/cc/output/direct_renderer.cc
+++ b/cc/output/direct_renderer.cc
@@ -222,20 +222,6 @@
 
   BeginDrawingFrame(&frame);
 
-  if (output_surface_->IsDisplayedAsOverlayPlane()) {
-    // Create the overlay candidate for the output surface, and mark it as
-    // always
-    // handled.
-    OverlayCandidate output_surface_plane;
-    output_surface_plane.display_rect =
-        gfx::RectF(root_render_pass->output_rect);
-    output_surface_plane.quad_rect_in_target_space =
-        root_render_pass->output_rect;
-    output_surface_plane.use_output_surface_for_resource = true;
-    output_surface_plane.overlay_handled = true;
-    frame.overlay_list.push_back(output_surface_plane);
-  }
-
   // If we have any copy requests, we can't remove any quads for overlays,
   // otherwise the framebuffer will be missing the overlay contents.
   if (root_render_pass->copy_requests.empty()) {